> ## Documentation Index
> Fetch the complete documentation index at: https://docs.abbyy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Classify Method of the Model Object

> Classify method of the Model object in the ABBYY FineReader Engine API — uses the model to classify a given ClassificationObject and returns category-label / probability pairs.

Uses the model to classify a given classification object. As the result of this method call, you will receive a collection of pairs "category label — probability," and will then be able to select the most likely category for the document or page from which the classification object was created.

<Note>
  In Linux and Windows : Model training and classification will be performed in sequential mode, regardless of the [IMultiProcessingParams::MultiProcessingMode](/fine-reader/engine/api-reference/parameter-objects/multiprocessingparams#multiprocessingmode) value.
</Note>

## Syntax

### C++

```cpp theme={null}
HRESULT Classify(
  IClassificationObject*   Object,
  IClassificationResults** Result
);
```

### C\#

```csharp theme={null}
IClassificationResults Classify( IClassificationObject Document );
```

### Visual Basic .NET

```vb theme={null}
Function Classify(Document As IClassificationObject) As IClassificationResults
```

## Parameters

Object

\[in] A [ClassificationObject](/fine-reader/engine/api-reference/classification-related-objects/classificationobject) which needs to be classified. Note that if the classification object was created from a document or page which had not been previously recognized, you will not be able to classify it with the help of a classifier which uses the text features. You can check that the object's [SuitableClassifiers](/fine-reader/engine/api-reference/classification-related-objects/classificationobject#suitableclassifiers) property contains the classifier specified in [IModel::ClassifierType](/fine-reader/engine/api-reference/classification-related-objects/model#classifiertype).

Result

\[out, retval] A pointer to the IClassificationResults\* pointer variable that receives the interface pointer of the output [ClassificationResults](/fine-reader/engine/api-reference/classification-related-objects/classificationresults) object. The classification results are sorted by probability in descending order. May be null if the classifier could not assign the classification object to any of the categories.

## Return values

This method has no specific return values. It returns the [standard return values of ABBYY FineReader Engine functions](/fine-reader/engine/api-reference/return-codes).

## See also

[Model](/fine-reader/engine/api-reference/classification-related-objects/model)